Pen



FIG. 1 is a left side perspective view of a pen in accordance with thenew design;

FIG. 2 is a rear view thereof;

FIG. 3 is a front view thereof;

FIG. 4 right side view thereof, the left side view being a mirror imagethereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is an enlarged perspective view of the area labeled “7” in FIG.1.

The broken lines in FIGS. 1 and 7 are included for the purpose ofidentifying the detail view shown in FIG. 7 and form no part of theclaimed design.

CLAIM The ornamental design for a pen, as shown and described.